From patchwork Tue Jul 7 09:10:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 11648071 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EBA0414E3 for ; Tue, 7 Jul 2020 09:09:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D45FD207BB for ; Tue, 7 Jul 2020 09:09:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="my3/NmjF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726745AbgGGJJl (ORCPT ); Tue, 7 Jul 2020 05:09:41 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:46864 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725874AbgGGJJl (ORCPT ); Tue, 7 Jul 2020 05:09:41 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 06799bXc094489; Tue, 7 Jul 2020 04:09:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1594112977; bh=apBcm8KT8pPXFkAQ+4y0dISm+b7P0iqDl7j3ffEUMtE=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=my3/NmjFfvbhbwFo3DTdhwce4z8xLdtW/ZAVUJD7ZstGaLojGe0jyAn1a0Xr6r5RM sI6aaEAqf8kN3JHNKvbDZw6BVN91DHtc5bjjSnIdhiTCBKAFPQ/tq3rCDpVjr1AOju E5W0qmo4URmUBFsoCXldcgbmsPBA9E4BwXbDg1jI= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 06799Wgl086512 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 7 Jul 2020 04:09:37 -0500 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Tue, 7 Jul 2020 04:09:36 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Tue, 7 Jul 2020 04:09:35 -0500 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 06799RGm052457; Tue, 7 Jul 2020 04:09:34 -0500 From: Peter Ujfalusi To: CC: , , Subject: [PATCH 1/5] dmaengine: ti: k3-udma: Remove dma_sync_single calls for descriptors Date: Tue, 7 Jul 2020 12:10:27 +0300 Message-ID: <20200707091031.10411-2-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200707091031.10411-1-peter.ujfalusi@ti.com> References: <20200707091031.10411-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org The descriptors are allocated via wither dma_pool or dma_alloc_coherent. There is no need for the dma_sync_singel_* calls. Signed-off-by: Peter Ujfalusi --- drivers/dma/ti/k3-udma.c | 37 ++----------------------------------- 1 file changed, 2 insertions(+), 35 deletions(-) diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 6c879a734360..919669634d87 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -539,30 +539,6 @@ static bool udma_is_chan_paused(struct udma_chan *uc) return false; } -static void udma_sync_for_device(struct udma_chan *uc, int idx) -{ - struct udma_desc *d = uc->desc; - - if (uc->cyclic && uc->config.pkt_mode) { - dma_sync_single_for_device(uc->ud->dev, - d->hwdesc[idx].cppi5_desc_paddr, - d->hwdesc[idx].cppi5_desc_size, - DMA_TO_DEVICE); - } else { - int i; - - for (i = 0; i < d->hwdesc_count; i++) { - if (!d->hwdesc[i].cppi5_desc_vaddr) - continue; - - dma_sync_single_for_device(uc->ud->dev, - d->hwdesc[i].cppi5_desc_paddr, - d->hwdesc[i].cppi5_desc_size, - DMA_TO_DEVICE); - } - } -} - static inline dma_addr_t udma_get_rx_flush_hwdesc_paddr(struct udma_chan *uc) { return uc->ud->rx_flush.hwdescs[uc->config.pkt_mode].cppi5_desc_paddr; @@ -593,7 +569,6 @@ static int udma_push_to_ring(struct udma_chan *uc, int idx) paddr = udma_curr_cppi5_desc_paddr(d, idx); wmb(); /* Ensure that writes are not moved over this point */ - udma_sync_for_device(uc, idx); } return k3_ringacc_ring_push(ring, &paddr); @@ -628,12 +603,12 @@ static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr) } if (ring && k3_ringacc_ring_get_occ(ring)) { - struct udma_desc *d = NULL; - ret = k3_ringacc_ring_pop(ring, addr); if (ret) return ret; + rmb(); /* Ensure that reads are not moved before this point */ + /* Teardown completion */ if (cppi5_desc_is_tdcm(*addr)) return ret; @@ -641,14 +616,6 @@ static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr) /* Check for flush descriptor */ if (udma_desc_is_rx_flush(uc, *addr)) return -ENOENT; - - d = udma_udma_desc_from_paddr(uc, *addr); - - if (d) - dma_sync_single_for_cpu(uc->ud->dev, *addr, - d->hwdesc[0].cppi5_desc_size, - DMA_FROM_DEVICE); - rmb(); /* Ensure that reads are not moved before this point */ } return ret;